Online check-in or airport kiosk: which is faster for Delta?

My experience:

• Online check-in is faster, because you skip the check-in step and save your boarding pass on your phone.
• With a checked bag, you still need to drop it off at the counter or bag drop.
• Kiosks are helpful if you need to print bag tags or can’t use the app.

Doing it online first and going straight to bag drop saved me a lot of time. More about Delta online check-in is here.